Look for IT over here

Do you want to change the default file folder Outlook 2003 uses for attachments? While you can’t set a folder for attachments you send, you can set one for storing received attachments. You need to navigate to

HKEY_CURRENT USER\Software\Microsoft\Office\11.0\Outlook\Options

and add a string value called DefaultPath then enter the folder path.

The next time you use the File, Save attachment menu, Outlook’s save explorer opens to that folder.

Disclaimer: Changing registry entries is done at the user’s own risk. I take no responsibility for any problems relating to the regaistry change mentioned above - but I have tried it and it works!